adding brief intro of repo

Signed-off-by: h4l0gen <[email protected]>

content/github.md

@@ -5,19 +5,28 @@ title: Join TUF GitHub
 ### Check out [theupdateframework](https://github.com/theupdateframework) GitHub repositories:
 
 > ## [python-tuf Repository](https://github.com/theupdateframework/python-tuf)
+> this repository is a reference implementation written in python
 
 > ## [specification Repository](https://github.com/theupdateframework/specification)
+> The Update Framework specification
 
 > ## [theupdateframework.io Repository](https://github.com/theupdateframework/theupdateframework.io)
+> Website assets for TUF
 
 > ## [community Repository](https://github.com/theupdateframework/community)
+> Community repository of TUF
 
 > ## [taps Repository](https://github.com/theupdateframework/taps)
+> TUF Augmentation Proposals (TAPs)
 
 > ## [tuf-on-ci Repository](https://github.com/theupdateframework/tuf-on-ci)
+> A TUF repository and signing tool
 
 > ## [rust-tuf Repository](https://github.com/theupdateframework/rust-tuf)
+> Rust implementation of The Update Framework (TUF)
 
 > ## [go-tuf Repository](https://github.com/theupdateframework/go-tuf)
+> Go implementation of The Update Framework (TUF)
 
 > ## [tuf-js Repository](https://github.com/theupdateframework/tuf-js)
+> JavaScript implementation of the Update Framework (TUF)